Drain chilies, cut into 12 strips. Warm tortillas in oven. Combine sour cream, cottage cheese, salt, and pepper. Reserve 1/2 cup of mixture. Spoon remaining mixture in center of each tortilla. Add a strip of chili and a strip of cheese on each. Roll up and place seam side down in greased baking dish.
Combine reserved 1/2 cup mixture and enchilada sauce together and pour over top. Bake at 350 degrees for 30 minutes. Garnish with grated cheese, chopped onion, black olives and shredded lettuce.